Seed all CSV entries, fix category mapping, add duplicate detection in filtering

- Remove isValidEntry filter from seed: all 214 CSV rows are now seeded
  (Ignore/Doublon/test entries included for AI screening to handle)
- Fix category mapping: normalize non-breaking spaces (U+00A0) that
  caused all categories to map to null
- Add built-in duplicate submission detection in stage-filtering that
  groups projects by submitter email and always flags (never auto-rejects)
  so admin must review
- AI screening runs for duplicates even if deterministic rules fail,
  with sibling project metadata attached for admin context
- Update Candidatures2026.csv with expanded team list
- Simplify routing to award assignment (migration + schema cleanup)

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

prisma/migrations/20260214000000_simplify_routing_to_award_assignment/migration.sql

@@ -0,0 +1,33 @@
+-- Simplify RoutingMode enum: remove POST_MAIN, rename PARALLEL → SHARED
+-- Drop RoutingRule table entirely
+
+-- 1. Update existing PARALLEL values to SHARED, POST_MAIN to SHARED
+UPDATE "Track" SET "routingMode" = 'PARALLEL' WHERE "routingMode" = 'POST_MAIN';
+
+-- 2. Rename enum values using the ALTER TYPE approach
+-- First rename PARALLEL → SHARED
+ALTER TYPE "RoutingMode" RENAME VALUE 'PARALLEL' TO 'SHARED';
+
+-- 3. Remove POST_MAIN from the enum
+-- PostgreSQL doesn't support DROP VALUE directly, so we recreate the enum
+-- Since we already converted POST_MAIN values to PARALLEL (now SHARED), this is safe
+-- We need to: create new enum, update column, drop old enum
+
+-- Actually, since we already renamed PARALLEL to SHARED and converted POST_MAIN rows,
+-- we need to remove POST_MAIN. PostgreSQL 13+ doesn't support removing enum values directly.
+-- We'll use the column swap approach.
+
+-- Step A: Remove the foreign key constraint temporarily and update the column
+ALTER TABLE "Track" ALTER COLUMN "routingMode" TYPE TEXT;
+
+-- Step B: Drop the old enum
+DROP TYPE "RoutingMode";
+
+-- Step C: Create new enum without POST_MAIN
+CREATE TYPE "RoutingMode" AS ENUM ('SHARED', 'EXCLUSIVE');
+
+-- Step D: Convert column back to enum
+ALTER TABLE "Track" ALTER COLUMN "routingMode" TYPE "RoutingMode" USING "routingMode"::"RoutingMode";
+
+-- 4. Drop RoutingRule table
+DROP TABLE IF EXISTS "RoutingRule";